21716940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1783}}^1$

素因数の和:1831

約数の個数: 96

約数和(自身を含む): 71930880

約数和(自身を除く): 50213940

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 29, 30, 35, 42, 58, 60, 70, 84, 87, 105, 116, 140, 145, 174, 203, 210, 290, 348, 406, 420, 435, 580, 609, 812, 870, 1015, 1218, 1740, 1783, 2030, 2436, 3045, 3566, 4060, 5349, 6090, 7132, 8915, 10698, 12180, 12481, 17830, 21396, 24962, 26745, 35660, 37443, 49924, 51707, 53490, 62405, 74886, 103414, 106980, 124810, 149772, 155121, 187215, 206828, 249620, 258535, 310242, 361949, 374430, 517070, 620484, 723898, 748860, 775605, 1034140, 1085847, 1447796, 1551210, 1809745, 2171694, 3102420, 3619490, 4343388, 5429235, 7238980, 10858470, 21716940]

約数ペア:

[(1, 21716940), (2, 10858470), (3, 7238980), (4, 5429235), (5, 4343388), (6, 3619490), (7, 3102420), (10, 2171694), (12, 1809745), (14, 1551210), (15, 1447796), (20, 1085847), (21, 1034140), (28, 775605), (29, 748860), (30, 723898), (35, 620484), (42, 517070), (58, 374430), (60, 361949), (70, 310242), (84, 258535), (87, 249620), (105, 206828), (116, 187215), (140, 155121), (145, 149772), (174, 124810), (203, 106980), (210, 103414), (290, 74886), (348, 62405), (406, 53490), (420, 51707), (435, 49924), (580, 37443), (609, 35660), (812, 26745), (870, 24962), (1015, 21396), (1218, 17830), (1740, 12481), (1783, 12180), (2030, 10698), (2436, 8915), (3045, 7132), (3566, 6090), (4060, 5349)]